package main

import(
	"fmt"
)


func main(){
	var err error
	var seq uint64
	var index uint64
	text := "0000000000000000-0000000000000000.wal"
	_, err = fmt.Sscanf(text, "%016x-%016x.wal", &seq, &index)
	fmt.Println(err, seq, index)
}